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Entries in Asterisk (2)


DTMF issues with Trixbox/Asterisk?

Having problems with DTMF tones being recognized?

Our company was having issues where DTMF tones weren’t being recognized on certain IVRs… It was most reproducible trying to join most gotomeetings. We were running Asterisk 1.6.0 and Trixbox 2.8.

We tried pretty much everything possible including talking with our trunk, trying a different trunk, trying the different protocols, debugging with wireshark and nothing really made sense. We have our PBX hosted with lylix and the excellent engineers there upgraded our instance to Asterisk and since then our DTMF issues have gone away. More info on this bug fix can be found here:

Update: improved the issue signifigantly… but not completely.  We built asterisk from source upgrading it whatever is current around 1/15/2012 (too lazy to look up version email me if you need it though).

Keywords:, GoToMeeting, DTMF


Switching from RingCentral to a Asterisk box... My Notes.

Here are my notes I put together when I did the pros and cons of switching to an asterisk based PBX system for my company.  At the time of writing we are using both concurrently.  In a nutshell, if you have someone tech savvy it’s definitely worth it.  You get a lot more features, freedom, and it’s cheaper.  My notes below are unedited from a google doc I kept so please excuse the grammar issues.

The notes on this article were prepared in September of 2010.

Feature Comparison RingCentral Vs Asterisk PBX  

Ring Central Pros:

  • The user interface is somewhat easier to use for setting up business hour calling rule type stuff.
  • Couldn’t find an option to have an email come through when someone doesn’t answer a call (but caller doesn’t leave a voice mail).
  • Ability to send a fax by sending an email (like the Ringcentral FaxOut option) is not built in to Asterisk by default.  There are addons which apparently provide this capability one is called AsterFax but since this functionality if built in to ringcentral it’s a pro for it. 
  • Other then that… all other features are matched / exceeded by Asterisk.

Asterisk Advantages:

  • Can have unlimited number of extentions and it doesn’t cost us any more a month.  Simplified per minute billing.  This means everyone can have a softphone + deskphone and it doesn’t cost anymore.
  • HD Voice capable (for higher quality phone calls)
  • Attended Transfer Option (allows you to stay on the line with caller in case the person you’re transfering to doesn’t pick up)
  • Caller ID can display contacts from our SugarCRM Database.
  • Caller ID can be prefixed with things like “Support:<number>|<contact name>”, “Sales:<number>|<contact name>”
  • Ability to define nested IVR hierarchy’s 
  • Panel view for when we have a receptionist allows them to transfer with drag and drop + see status of people’s phones.
  • Softphone’s dont add any additional cost (since extensions are free…)
  • Conference Calls can be done using a special extention… and all people attending call from inside your company don’t eat up your minutes. 
  • Interoffice calls are free (they’re handled by the PBX internally).
  • We can add direct dial numbers for 1.29 a month. 
  • Call Recording capabilities… we can have all sales calls recorded automatically for quality assurance. 
  • Call Queues - (people get put on hold until someone is available)
  • Call Parking Lots — (from the phone you can press a key sequence to put someone into a “parking lot slot”  then you call over to your buddy and say you have a call on 78.  The user then picks up his phone presses *78 and they’re connected to them.
  • Smart features like… If i’m already on a phone call and then I get a new call do not have it ring my cell phone also.  (in other words it skips the Find Me Settings if you’re using your desk phone).

Cost Comparison of RingCentral vs. Asterisk+FlowRoute

 Month of August: 

   Inbound Minutes: 1700
   Outbound Minutes: 2800

Asterisk + FlowRoute Sample Cost for August: 

   Monthly Fee: $35 (hosting fee to have asterisk box hosted by lylix)

   DID Fee: $1.39   (This is for each direct number… so we could have a support number, a local number and 866 number)

   Outbound Minute Cost: $27.44 = 0.0098 * 2793

   Inbound Minute Cost: $32.30 = 0.0190 * 1700 
   Total: $96.13

RingCentral Sample Cost for August 

   Digital Line Fees:  74.93 = 9.99 (ext1) + 9.99 (ext2) + 9.99 (ext3) + 4.99 (engineer ext) + 24.99 (sales ext) + 9.99 (ext4) + 4.99 (ext5) 

   RingCentral Power: 49.99 (includes 1000 minutes)

   Not Included Incoming Minutes: 29.4 = 700 * 0.042 

   Total: $154.32 + any minute pool overages

    * - Outbound minutes are assumed to be covered by each persons digital line.  This isn’t really the case since Basic lines don’t come with any minutes and people might go over minutes in standard plan.

* Since the per minute rates are much lower using flowroute the cost savings will go up significantly as you add more lines and use more minutes.